1 /* $OpenBSD: tb_asnmth.c,v 1.4 2014/07/10 13:58:22 jsing Exp $ */
2 /* ====================================================================
3 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * licensing@OpenSSL.org.
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
58 #include <openssl/err.h>
61 #include "asn1_locl.h"
62 #include <openssl/evp.h>
64 /* If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the
65 * function that is used by EVP to hook in pkey_asn1_meth code and cache
66 * defaults (etc), will display brief debugging summaries to stderr with the
68 /* #define ENGINE_PKEY_ASN1_METH_DEBUG */
70 static ENGINE_TABLE *pkey_asn1_meth_table = NULL;
73 ENGINE_unregister_pkey_asn1_meths(ENGINE *e)
75 engine_table_unregister(&pkey_asn1_meth_table, e);
79 engine_unregister_all_pkey_asn1_meths(void)
81 engine_table_cleanup(&pkey_asn1_meth_table);
85 ENGINE_register_pkey_asn1_meths(ENGINE *e)
87 if (e->pkey_asn1_meths) {
89 int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
91 return engine_table_register(&pkey_asn1_meth_table,
92 engine_unregister_all_pkey_asn1_meths, e, nids,
99 ENGINE_register_all_pkey_asn1_meths(void)
103 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
104 ENGINE_register_pkey_asn1_meths(e);
108 ENGINE_set_default_pkey_asn1_meths(ENGINE *e)
110 if (e->pkey_asn1_meths) {
112 int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
114 return engine_table_register(&pkey_asn1_meth_table,
115 engine_unregister_all_pkey_asn1_meths, e, nids,
121 /* Exposed API function to get a functional reference from the implementation
122 * table (ie. try to get a functional reference from the tabled structural
123 * references) for a given pkey_asn1_meth 'nid' */
125 ENGINE_get_pkey_asn1_meth_engine(int nid)
127 return engine_table_select(&pkey_asn1_meth_table, nid);
130 /* Obtains a pkey_asn1_meth implementation from an ENGINE functional reference */
131 const EVP_PKEY_ASN1_METHOD *
132 ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid)
134 EVP_PKEY_ASN1_METHOD *ret;
135 ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e);
137 if (!fn || !fn(e, &ret, NULL, nid)) {
138 ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH,
139 ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
145 /* Gets the pkey_asn1_meth callback from an ENGINE structure */
146 ENGINE_PKEY_ASN1_METHS_PTR
147 ENGINE_get_pkey_asn1_meths(const ENGINE *e)
149 return e->pkey_asn1_meths;
152 /* Sets the pkey_asn1_meth callback in an ENGINE structure */
154 ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f)
156 e->pkey_asn1_meths = f;
160 /* Internal function to free up EVP_PKEY_ASN1_METHOD structures before an
161 * ENGINE is destroyed
165 engine_pkey_asn1_meths_free(ENGINE *e)
168 EVP_PKEY_ASN1_METHOD *pkm;
170 if (e->pkey_asn1_meths) {
173 npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0);
174 for (i = 0; i < npknids; i++) {
175 if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) {
176 EVP_PKEY_asn1_free(pkm);
182 /* Find a method based on a string. This does a linear search through
183 * all implemented algorithms. This is OK in practice because only
184 * a small number of algorithms are likely to be implemented in an engine
185 * and it is not used for speed critical operations.
188 const EVP_PKEY_ASN1_METHOD *
189 ENGINE_get_pkey_asn1_meth_str(ENGINE *e, const char *str, int len)
193 EVP_PKEY_ASN1_METHOD *ameth;
195 if (!e->pkey_asn1_meths)
199 nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0);
200 for (i = 0; i < nidcount; i++) {
201 e->pkey_asn1_meths(e, &ameth, NULL, nids[i]);
202 if (((int)strlen(ameth->pem_str) == len) &&
203 !strncasecmp(ameth->pem_str, str, len))
211 const EVP_PKEY_ASN1_METHOD *ameth;
217 look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg)
219 ENGINE_FIND_STR *lk = arg;
224 for (i = 0; i < sk_ENGINE_num(sk); i++) {
225 ENGINE *e = sk_ENGINE_value(sk, i);
226 EVP_PKEY_ASN1_METHOD *ameth;
227 e->pkey_asn1_meths(e, &ameth, NULL, nid);
228 if (((int)strlen(ameth->pem_str) == lk->len) &&
229 !strncasecmp(ameth->pem_str, lk->str, lk->len)) {
237 const EVP_PKEY_ASN1_METHOD *
238 ENGINE_pkey_asn1_find_str(ENGINE **pe, const char *str, int len)
240 ENGINE_FIND_STR fstr;
246 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
247 engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr);
248 /* If found obtain a structural reference to engine */
250 fstr.e->struct_ref++;
251 engine_ref_debug(fstr.e, 0, 1)
254 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);